حلقات O من بونا-ن نيتريل 0.139 بوصة CS × 2.359 بوصة ID | AS568-229 | داش 229 | صلابة 50 (100/عبوة)

I needed a softer seal for a low-pressure hydraulic cylinder and these 50-durometer o-rings did the trick—the -40°F to +250°F rating gives me confidence they'll hold up across seasons.

The dash 229 size was exactly right for my hydraulic reseal job, and the softer 50 durometer made them much easier to seat than the stiffer ones I’ve wrestled with before. I’ve used them in a coolant line running around 200°F with no swelling or leaks a few weeks in.

The 50-durometer compound is flexible enough to snap into place easily, yet these o-rings seal perfectly on my pneumatic fittings. I’ve had no leaks since installing them, and the 100-pack means I’ll have spares for future projects.